Country | Documents | Citable documents | Citations | Self-Citations | Citations per Document | H index | ||
---|---|---|---|---|---|---|---|---|
1 | United States | 15621 | 14574 | 1219804 | 503406 | 78.09 | 1012 | |
2 | Japan | 3809 | 3766 | 210510 | 38357 | 55.27 | 526 | |
3 | Germany | 3270 | 3153 | 294100 | 49218 | 89.94 | 570 | |
4 | United Kingdom | 3151 | 2937 | 301104 | 49323 | 95.56 | 618 |
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